timfi/pyecs

An implementation of the Entity-Component-System pattern.

pyecs

A simple implementation of the Entity-Component pattern.

Install

This project is available on PyPI so you can simply install it via

pip install pyecs

Example

from dataclasses import dataclass
from typing import Tuple

from pyecs import Store

# 1. build your components
@dataclass
class Transform:
    position: Tuple[float, float] = (0.0, 0.0)


@dataclass
class Rigidbody:
    velocity: Tuple[float, float] = (0.0, 0.0)
    acceleration: Tuple[float, float] = (0.0, 0.0)


if __name__ == "__main__":
    # 2. intialize entity-component store
    store = Store()

    # 3. add some entities
    scene = store.add_entity()
    scene.add_child(Transform(), Rigidbody(acceleration=(1.0, 0.0)))
    scene.add_child(Transform(), Rigidbody(acceleration=(0.0, 1.0)))
    scene.add_child(Transform(), Rigidbody(acceleration=(1.0, 1.0)))

    # 4. run everything
    while True:
        for entity in store.get_entities_with(Transform, Rigidbody):
            transform, rigidbody = entity.get_components(Transform, Rigidbody)
            rigidbody.velocity = (
                rigidbody.velocity[0] + rigidbody.acceleration[0],
                rigidbody.velocity[1] + rigidbody.acceleration[1],
            )
            transform.position = (
                transform.position[0] + rigidbody.velocity[0],
                transform.position[1] + rigidbody.velocity[1],
            )
            print(f"{transform=}\t{rigidbody=}")

Dev Setup

Simply install pipenv and run the following line:

pipenv install --dev